How can I change all the elements in a matrix with value1 to a new value2?

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I have a 78X78 binary matrix. How can I change all the 0s to -1s?

Answers (2)

Torsten K
Torsten K on 15 Oct 2020
How about this?
m = randi([0,1],78) % 78x78 matrix with random integers in the interval 0..1
m(m==0)=-1 % Substitute all 0's b -1's
Best regards
Torsten

Ameer Hamza
Ameer Hamza on 15 Oct 2020
Edited: Ameer Hamza on 15 Oct 2020
Another approach
M; % 78x78 matrix
M_new = 2*M-1;
This will be faster as compared to the indexing approach.

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